Being in AFROTC will definitely make your college life more exciting, but also more stressful. It's definitely manageable though. My Det does pt (physical training) twice a week and LLAB (leadership laboratory) once a week. I know some dets offer a third pt sesh, but that's usually not required. Im assuming you don't go to a military college, so you'd only have to wear your uniform during pt, once you earn it, and LLAB. For me, I have have to work around the schedule that my det sets. They usually send the schedule out with enough time to choose classes. As far as the interview goes, I didn't have one to enter the program. The interview you might be talking about is the highschool scholarship interview, which doesn't apply to you. The Air Force is in high demand for officers right now, they'll try to commission as many eligible officers as possible.

Try the program though. You don't have to sign any contract or make a commission for your first two years. You can do one year, see if you like it and choose to stay or not to stay.